According to the Economic Information News, on September 8, the 2019 Internet of Things Password Application Summit was held in Wuxi. Wang Xiaoyun, a cryptographer and academician of the Chinese Academy of Sciences, said at the meeting that the Internet of Things (IoT) network is the nerve center of economic and social operations and the target of possible attacks. The password is the core technology and basic support for the security of the Internet of Things. Cryptography is a discipline that combines mathematics, information science, computer science, and physics to integrate and integrate deeply. The cryptography technology will deeply integrate 5G, blockchain, artificial intelligence, satellite communication and other technologies to protect the Internet of Things security.